EP 3198991 B1 20190619 - METHOD AND CIRCUIT ARRANGEMENT FOR FEEDING A SERIES CIRCUIT OF N LED UNITS
Title (en)
METHOD AND CIRCUIT ARRANGEMENT FOR FEEDING A SERIES CIRCUIT OF N LED UNITS
Title (de)
VERFAHREN UND SCHALTUNGSANORDNUNG ZUM SPEISEN EINER SERIENSCHALTUNG VON N LED-EINHEITEN
Title (fr)
PROCÉDÉ ET CIRCUIT D'ALIMENTATION D'UN MONTAGE EN SÉRIE DE N UNITÉS À DEL
Publication
Application
Priority
- AT 506712014 A 20140922
- AT 2015050195 W 20150811
Abstract (en)
[origin: WO2016044869A1] The invention relates to a method and to a circuit arrangement for feeding n LED units (LED1 , ... LED5) of a lamp unit of a motor vehicle by means of a controlled current source (5) from a voltage source (2) having fluctuating operating voltage (UB), in which the connecting of the LED units (LED1 , ... LED5) in the event of the operating voltage (UB) falling is carried out whilst taking into account a stored weighting with regard to the priority assigned to the individual LED units, in particular each k LED units (LED1, ..., LED5) of a series circuit are short-circuited, wherein at the same time (n-k) LED units remain energized. At the same time, a control unit (3) for driving the current source is assigned a storage unit (7) for storing information about weightings relating to the priority of specific LED units, a switching matrix (4', S1, ..., S4), in particular a switch arrangement of n controlled switches (S1, ..., S4) each bridging the LED units (LED1, ..., LED4, LED5) is provided, and the control unit (3) is configured to compare the operating voltage and/or the current (IS) from the current source with predefined threshold values and to carry out the connection of the LED units on the basis of this comparison and the weighting.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: AT CN EP US)
B60Q 1/0408 (2013.01 - US); H05B 45/00 (2020.01 - EP US); H05B 45/44 (2020.01 - AT); H05B 45/48 (2020.01 - CN EP US); B60Q 1/16 (2013.01 - AT); F21S 41/663 (2017.12 - AT)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2016044869 A1 20160331; AT 516294 A1 20160415; AT 516294 B1 20170115; AT 516294 B8 20170215; CN 107079550 A 20170818; CN 107079550 B 20210112; EP 3198991 A1 20170802; EP 3198991 B1 20190619; US 10071672 B2 20180911; US 2017282782 A1 20171005
DOCDB simple family (application)
AT 2015050195 W 20150811; AT 506712014 A 20140922; CN 201580051122 A 20150811; EP 15756823 A 20150811; US 201515512111 A 20150811